Please help me to find the right answer:

1. Which of the following is NOT a valid declaration for a character string?

a) char string1[3] = {1, 2, 3, 4}

b) char string1[12];

c) char string1[] = this is a string;

d) char string1[25] = this is a string;

2. The statement x++;

a) Increments the value currently stored in the variable x and stores that new value back in the variable x

b) Checks to see if x is at its maximum value and if so, exits the for loop

c) Moves the character pointer x to the next integer number in the string

3. The statement:

if(int x=5) {

Code;

}

a) Sets x to the value of 5 and since that is non-zero, returns true, and executes code

b) Checks to see if x is equal to 5 and if true executes code

c) Sets x to the value of 5 but since that is not a valid true/false test, does not execute code